Submersible pump



FIG. 1 is a front elevation view of the submersible pump showing the new design;

FIG. 2 is a side view thereof;

FIG. 3 is a side view taken from the side opposite that shown in FIG. 2;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a submersible pump, as shown. 